Pipe



PIPE

Filed Aug. :5, 1942 Feb. 25, 1947. 'l J. FERLA v Patented Feb. 25, 1.947

` UNITED sTArEs PATENTN lOFFICE John Ferla, East Asbestos Orange. N. J., assignor to U. S.

Cement vPipe Company, Camden, N. J., a corporationof Newleraey inspannen August s. 1942, serial No. 453,441

4 Chim. (Cl. 285-112) 2,177,643, October One object of ,the invention is to provide a pipe constructed of asbestos cementitious material, having a bell formed integrally with the barrel of the pipe, so as to facilitate the juncture of sections of the pipe providing simple buteffective couplings therebetween, without thenecessity for the provision of separate and independent couplings which have been necessary heretofore. p,

A further object of thel invention is to provide for the use of non-metallic` pipes, such yas are formed by asbestos cementitious material, for the transmission of hydrocarbon products, such as gasoline, fuel oil, natural gas, etc., which normally would penetrate to some extent into or through the wall of the pipe under the pressures normally used inv pipe lines, but this can be prevented by a protective sheet or tube of metal or other suitable material covering the inner surface of the pipe, and'of such character as will prevent penetration by the oil, gas, etc.

By forming the bell collar directly on the barrel of the pipe, integral therewith, `the pipe is thus constructed with a strength substantially equal to that of steel pipe due to the knitting together of the wall structure by the asbestos fibers distributed throughout the cementitious material, which makes it practical for the pipe to be thus formed with the integral bell collar. This enables a joint to be provided with very little packing, by means of a gasket interposed between the 'barrel and .the bell.

I have` shown different embodiments of the invention in 'the accompanying drawings, in

i which:

i gasket. The invention as shown inthe embodiment set forth in Fig. 1, includes a pipe formed ofasbestos cementitious material, which is formed with a barrel I, at one end of which is a bell collar 2. These may be formed substantially in the manner s et forth h1 my priorl application, Ser. No. 184,509, filed January 12, 1938, now Patent No. 3l, 1939. The processl thus set forth in said application and patent includes the transfer of a layer of composition material, preferably containing asbestos o'r other ber and cement, onto a mandrel, and successively applying additional layers thereto under' pressure until the pipe is formed of suitable or desired wall thickness. Both the bell collar and the barrel are formed simultaneously of uniform composition, integral with each other so as .to form one integral piece. The asbestos or other bers distributed uniformly throughout the cementitious composition, both in the bell and barrel portions of the pipe, tie these parts together with a. very great strength, sufilcient for high pressure pipe, and insures the retention of the bell on the barrel against separation therefrom.

Due to the increased pressure to which they bell may be subjected, forming the joint of the pipe, it, may be made of increased thickness, as shown in Fig, 1, to impart additional resistance thereto. One way of increasing the thickness of the bellrelative to the barrel, after these' have been formed initially of uniform wall thickness through fa I on a mandrel, is by an axial application of pressure to the end of the barrel expands the latter within a mold to the required wall thickness, thus imparting additional strength thereto.

In building the pipe on the apparatus set forth in my application, Ser. No. 247,507, filed December 23,v 1938,' now Patent No. 2,283,921, May 26,

A194:2, the mandrel to which the successive layers are applied, is first covered by a, surrounding shell that receives the layers of asbestos cementitious composition thereon. The application of the composition on the shell bonds the material thereto, although the shell can be loosened therefrom and removed before the composition sets.

Where the pipe is to be used for the transvmission of oil or gas, such as in'` a pipe line, the

shell being formed of thin metallic material should be shaped so as .to remain in the formed pipe and retain its bonded relation to the surrounding'wall thereof. Such a shellv is shown at 3 in Fig. 1, forming a lining for the pipe extending throughout the length of the barrel to the ends of the inner surface thereof. 'A similar lining is shown at l within the open endy of the bell 2,1a1so formed preferably of metallic material-and covering the o'p'en face of said bell. These linings 3 and 4 may be joined together rigidly as by welding at the point 5.

At the oppositel end of the barrel, a cap ring 6 is secured thereon over the end of the barrel and with an inturned flange 1 that extends over the face of said end of the barrel, being Preferably welded to tle lining 3 at 8.

The cap ring 6 is shown as formed with two annular grooves 9 in the outer periphery thereof to receive therein packing rings I which are thus .interposed between the cap ring 6 and the lining 4 of the bell. Before insertion of the end of the barrel into the bell, the packing rings are initially substantially of roundv cross section as indicated by dotted lines in Fig. 4, but the parts are forced together under pressure vso as to Ydeyform the packing rings I 0 substantially to the flattened shape illustrated in Figs. 1 and 4. The inner side vof the cap ring 6 at the periphery thereof is so formed at II to have a sliding fit with the inner face of the bell lining 4, but is rounded off in cross section so as not to have a. bearing face'which would interfere withthe insertion'of the cap ring into the bell. The substantial t between thesevparts is suiilcient to vexclude air from the packing rings which might tend to deteriorate the same in use.

This round; ed side face also permits lateral deectionof one pipe section relative tothe other as may be neces` sary to conform to the contour 0f the earth in which the pipe may be used. l v

The gaskets I0 may be formed of rubber, artiflcial rubber, or other suitable'pac'king material,` that will effectively seal thel joint. between the pipe sections. Where this pipel is used in an oil pipe line, the material of the gaskets should also be of such character as will not be affected by the oil or gas transmitted through the pipe. I have found that a plastic material having some of the characteristics of artificial rubber in its elasticity and yieldabilityl is materially advantageous for this purpose, inasmuch as it is not allected 4 by the oil or gas transmitted through the line.

'The lining 3, as well as the parts 4 and 6 applied to the pipe, are preferably constructed of` steel or other suitable material having substantially the characteristics thereof whichwill form an eective'joint and will not be affected by oil or gas, yor permit penetration of such hydrocarbon substances into the asbestos and cement body of the pipe. By forming the body of the pipe directly on the lining as a mandrel, this lining is securely bonded to the asbestos and cement coml position, so that it remains rigid therewith, and will not separate in service. At the same time l it prevents any penetration by the petroleum products into the material forming the barrel and bell of'the pipe.

If this lining be constructed of steel having a Wall thickness no greater than approximately one-eighth inch, the expansion and contraction of the lining will' be substantially equal to that l of the asbestos and cement pipe and thereby no tendency for separation of these parts in service.

i At the same time, this is suilicient thickness to prevent penetration of the body of the pipe by oil or gas. The pressure in the line is held primarily by the asbestos and cement composition, which may be increased in thickness for increase in 3 pressure, and the lining, if used, increases lthe service pressure and serves also to prevent penetration of the cementitious composition by the 1 hydrocarbons.

Where two packing rings are used in series, as

ered with additional material of similarcomposi-v tionand, the entire pipe Athen allowed to set and season to therequired extent for high pressure Pipe. v

' In this form also the lining 3b extends continuously throughout the length of the barrel and along the inner surface of the bell, 'as shown at 4b, forming one continuous covering therefor. A ring- 6b is applied over the end-of the barrel to receive and retain the packing ring Ib, of which vone ring onlyA is shown and may be used if desired, depending upon the pressures and fluids to be transmitted through the pipe. The free end of the barrel Ib is ycovered by a ange lb which is shown as separate from the ring 6b, although it may be formed integral therewith, if desired. These metallic parts may be welded or otherwise through the cracks therebetween.

In the form shown in Fig. 3, the barrel Ic is vcovered by a lining 3c which extends continuously I alongthe inner vface of the bell 2c, substantially as described in connection with Fig. 2. The ring 6c `that holds vthe packing ring I0c hasa concave face I3 to receive thereagainst aY second packing ring. The latter is usually oval in crossA section but is compressed between the concave circumferential groove I3 and a, similar groove I5 substantially to fit the space between the barrel and bell and prevent leakage therebetween. 'Ihe groove I5 is formed in an inturned portion I6` of a flange I'I which surrounds the barrelat the joint and is secured by bolts I8 with a` corre# spondingfiange I9. The latter flange, which also surrounds the pipe on-the opposite side of the bell 2c from the flange I1, has a face 20 to fit the contour of the bell. By drawing up the bolts I8, the parts of the packing may be subjected to pressure which will effectively prevent leakage at the gasket I4 even under very high pressures which may be encountered in some pipe lines.

The inturned portion I6 of the flange I1 has a groove 2| in the under face thereof that yextends substantially vthroughout the inner wall of said flange, leaving a relatively narrow rib at the inner end of the flange in position to bear against the outer periphery of the barrel portion Ic. Thus the flange does not bear on the periphery of the pipe barrel throughout its width, which allows for flexibility at the point, permitting tilting of the flange Il relative to the pipe barrel Ic, due to the small bearingcontact therewith. In the event of the tilting of4 the `flange Il relative to the left hand pipe section 3c in Fig. 3, the ange I9 remaining parallel with the flange I1 may be adjusted to a different position with respect to the bell 2c. ThisI allows substantial flexibility at the joint permitting adjustment of the pipe sections to different relative positions, and coupled in rigid secure relationship.

Although the lining shown and described is preferably constructed of thin steel tubing; if steel is not available k.for this purpose, such a lining shown in Fig. 1, this doubles the sealing effect ob-` rigidly secured together to prevent seepageI ,and means connecting said flanges together for asians may be formed of other material that will prevent penetration of oill and gas into the cementitious composition or formed as a coating of suitable material on the inner wall thereof.

I claim:

1. In a pipe joint, the combination of pipe sections including an interfitting bell and barrel spaced from each other, means forming a circumferential groove between the bell and barrel, an elastic gasket mounted in said groove and compressed betw'een the bell and barrel forming a uid-tight connection therebetween, anges surrounding said sections on respective opposite sides of the bell, said bell having a peripheral portion at one side thereof convex in cross section, one of said flanges having a concave inner surface in pressure bearing relation with the convex side portion of the bell and the other of saidilanges having pressure bearing relation with the gasket,

drawing the same toward each other to prevent displacement of'the gasket.

2. In a pipe joint, the combination of pipe sections formed of asbestos cementitious material and including an interiltting bell and barrel spaced from each other, means on said barrel forming a plurality of circumferential grooves arranged in side-by-side relation and spaced apart lengthwise of the axis of the sections, elastic gaskets mounted. in said grooves and compressed between the same and the barrel forming a fluid tight connection therebetween, flanges surrounding said sections on respective opposite sides of the bell, said bell having a peripheral portion at one side thereof convex in cross-section, one of said flanges having a concave inner surface in pressure bearing relation with' the convex side portion of the bell and the other of said ilanges having pressure bearing relation with the outermost one of the gaskets, and means connecting said flanges together for drawing the same toward each other to prevent displacement of the lastmentioned gasket.

3. In a pipe joint, the combination ot pipe sections formed of cementitious material and including an ineriltting bell and barrel, a metallic lining extending continuously through the barrel, la. metallic sleeve telescoped over the barrel and tion of the barrel and joined to the lining, and elastic .gaskets compressed in said grooves between the bell and barrel.

4. In a pipe joint, the combination of pipe sections formed of cementitious material and including an intertting bell and barrel, a metallic lining extending continuously through the barrel, a, metallic sleeve telescoped over the barrel and having a circumferential groove arranged in the periphery thereof within the bell, metallic means connected withY said sleeve and extending over the end portion of the barrel and joined to the liningand an elastic gasket compressed in said groove between the bell and the barrel.

JOHN FERLA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,910,643 Sherrard May 23, 1933 2,280,786 Boynton Apr. 28, 1942 2,226,067 Morgan Dec. 24, 1940 1,976,589 Trickey Oct. 9, 1934 2,031,057 Mitchell Feb. 18, 1936 779,169 Mac Donald Jan. 3, 1905 2,209,547 Whitacre July 30, 1940 2,158,829 Miller May 16, 1939 874,390 Carel Dec. 24, 1907 2,323,179 Hall et al. June 29, 1943 2,008,074 Isman July 16, 1935 1,931,024 Howard Oct. 17, 1933 FOREIGN PATENTS Number Country Date 808,647 France Nov. 14, 1936 644,601 Germany Apr. 15, 193'?` 416,816 Germany Jan. 28, 1923 808,647 France Nov. 14, 1936 5,612 Australia Sept. 27, 1932 637,085` Germany Oct. 19, 1936 6 l having a plurality of circumferential grooves arranged in side-'by-side relation in the periphery thereof within the bell, metallic means connected with said sleeve and extending over the end por- 

